fix: parse Disc qwinsta rows so RDG flap auto-logoff works (0.5.14)

Empty SESSIONNAME broke session matching; auto-disconnect failed with 'No matching Windows session'.

backend/tests/test_host_sessions.py

@@ -74,6 +74,32 @@ def test_parse_qwinsta_sessions_filters_user():
     assert filtered[0].session_id == "2"
 
 
+def test_parse_qwinsta_sessions_disconnected_without_sessionname():
+    """Disc rows often omit SESSIONNAME; auto flap logoff relies on these."""
+    stdout = """SESSIONNAME       USERNAME                 ID  STATE
+ rdp-tcp#0         B26\\s.shelkovaya          2  Active
+                   B26\\s.shelkovaya          5  Disc
+ rdp-tcp                                 65536  Listen
+ services                                0  Disc
+"""
+    rows = parse_qwinsta_sessions(stdout)
+    assert {(r.session_id, r.state.split()[0], r.session_name) for r in rows} == {
+        ("2", "Active", "rdp-tcp#0"),
+        ("5", "Disc", ""),
+    }
+    filtered = parse_qwinsta_sessions(stdout, filter_user=r"B26\s.shelkovaya")
+    assert [r.session_id for r in filtered] == ["2", "5"]
+
+
+def test_parse_qwinsta_sessions_filters_domain_user():
+    stdout = """SESSIONNAME       USERNAME                 ID  STATE
+ rdp-tcp#1         B26\\bob                   3  Active
+"""
+    rows = parse_qwinsta_sessions(stdout, filter_user=r"B26\bob")
+    assert len(rows) == 1
+    assert rows[0].session_id == "3"
+
+
 def test_event_supports_session_terminate_types():
     class HostStub:
         os_family = "linux"